第4题: [单项选择]As early as 1647 Ohio made a decision that free, tax-supported schools must be established in every town ______ 50 households or more. A. having B. to have C. to have had D. having had 参考答案:A 答案解析:现在分词having作后置定语,修饰前面的名词every town,因此选A。
第31题: [单项选择]1岁6个月男婴,6个月断母乳喂养改混合喂养(米糊、粥、蛋、鱼、肉均有补充),并保证每天有鲜牛奶。易发热、咳嗽,常于食牛奶后诉脐周痛,大便1~2次/日,稀糊状。体检面色苍白,心、肺(-),腹平软,肝肋下1cm,脾肋下未及。RBC3.5×1012/L,Hb80g/L,MCV67fL,网织红细胞0.015。解决上述情况最佳方法是() A. 停止鲜牛奶 B. 驱钩虫治疗 C. 改为注射铁剂 D. 增加叶酸口服 E. 予维生素B肌注 参考答案:A